Rotary compressor, control method thereof, and air conditioner using the same

ABSTRACT

A rotary compressor includes a cylinder to form a first compressing chamber and a second compressing chamber partitioned from each other and including a first vane slot and a second vane slot which are formed in the first compressing chamber and the second compressing chamber, respectively, and a first roller and a second roller to respectively rotate in the first compressing chamber and the second compressing chamber to compress compressing media, the rotary compressor operating in a full load running mode in which a load running is concurrently performed in the first compressing chamber and the second compressing chamber, and in a partial load running mode in which a load running is performed in only the second compressing chamber, the rotary compressor further including a first vane which is controllably accommodated in the first vane slot, a vane driving part to enable the first vane to contact and be distanced apart from an outer surface of the first roller to perform a load running and a no-load running in the first compressing chamber, and a controller to control the vane driving part to intermittently perform the load running in the first compressing chamber in the partial load running mode.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority under 35 U.S.C. § 119(a) from KoreanPatent Application No. 2006-0117738, filed on Nov. 27, 2006, in theKorean Intellectual Property Office, the disclosure of which isincorporated herein in its entirety by reference.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present general inventive concept relates to a rotary compressor, acontrol method thereof and an air conditioner using the same, and moreparticularly, to a rotary compressor to intermittently perform a loadrunning in a partial load running, thereby improving efficiency of acompressor, a control method thereof, and an air conditioner using thesame.

2. Description of the Related Art

A conventional, a cooling apparatus applied to an air conditioneremploys a variable capacity type rotary compressor varying a compressingability of a coolant to perform an optimal cooling satisfying a neededcondition, so that a cooling ability can be varied, and to reduce energyconsumption.

A conventional variable type rotary compressor is disclosed in KoreanPatent Publication No. 620044.

A conventional variable type rotary compressor includes a first cylinderand a second cylinder respectively forming a first compressing space anda second compressing space, compressing a compressing media and formedwith a first vane slot and a second vane slot in an inner surfacethereof, a first rolling piston and a second rolling pistoneccentrically coupled to a rotating shaft in the compressing space ofeach cylinder to execute a circulating movement, and a first vane and asecond vane provided to each vane slot to be forcedly contacted againstthe rolling piston to suck and compress coolant with the rolling piston.

The conventional variable type rotary compressor performs a full loadrunning in which a compressing media is concurrently compressed in thefirst compressing space and the second compressing space, and a partialload running in which a suction pressure relatively smaller thanpressure applied to the second compressing space is supplied to thesecond vane in the second compressing space to perform a no-load runningin the second compressing space so that the compressing media can becompressed only in the first compressing space.

When the rotary compressor operates, an inside of an airtight casingmaintains a high pressure by means of a compressed gas dischargedthrough discharge holes, and the compressed gas inside the casing isguided to the outside through a gas discharge pipe provided to an upperpart of the casing.

However, in the conventional rotary compressor, the inside of the casingmaintains a high pressure when the compressor is operated. If a partialload running of the compressor is continued, a high pressure gas insidethe casing leaks from between the rotating shaft and the second rollingpiston to the second compressing space maintaining a relatively lowpressure to flow backward through a second suction hole of the secondcylinder. Accordingly, the temperature of accumulator increases, whichresults in a deterioration of efficiency of the compressor, and anincrease in temperature of the cylinder during the partial load running.

SUMMARY OF THE INVENTION

The present general inventive concept provides a rotary compressor, acontrol method and an air conditioner using the same to improve apartial load running, thereby preventing the temperature of a cylinderfrom increasing according to the partial load running, and to improve apartial load efficiency of the compressor.

Additional aspects and utilities of the present general inventiveconcept will be set forth in part in the description which follows and,in part, will be obvious from the description, or may be learned bypractice of the general inventive concept.

The foregoing and/or other aspects of the present general inventiveconcept are achieved by providing a rotary compressor comprising acylinder to form a first compressing chamber and a second compressingchamber partitioned from each other and comprising a first vane slot anda second vane slot which is formed in the first compressing chamber andthe second compressing chamber respectively, and a first roller and asecond roller to respectively rotate in the first compressing chamberand the second compressing chamber to compress a compressing media, therotary compressor operating in a full load running mode in which a loadrunning is concurrently performed in the first compressing chamber andthe second compressing chamber, and in a partial load running mode inwhich a load running is performed in only the second compressingchamber, the rotary compressor further comprising a first vane which iscontrollably accommodated in the first vane slot, a vane driving partwhich enables the first vane to contact and be distanced apart from anouter surface of the first roller to perform a load running and ano-load running in the first compressing chamber, and a controller whichcontrols the vane driving part to intermittently perform the loadrunning in the first compressing chamber in the partial load runningmode.

The controller may control the vane driving part so that the first vanecan contact and be distanced apart from the outer surface of the firstroller according to a predetermined period.

The rotary compressor may further comprise a temperature sensing partwhich measures the temperature of a compressing media discharged fromthe cylinder, wherein the controller controls the vane driving partbased on a signal of the temperature sensing part.

The rotary compressor may further comprise a temperature sensing partwhich measures the temperature of a compressing media discharged fromthe cylinder, wherein the controller controls the vane driving partbased on a signal of the temperature sensing part.

The vane driving part may comprise a connecting pipe which communicateswith the first vane slot; a high pressure pipe which communicates withthe connecting pipe, and allows part of a compressing media dischargedfrom the cylinder to flow therethrough, a low pressure pipe whichcommunicates with the connecting pipe, and allows part of a compressingmedia introduced into the compressing chambers to flow therethrough, anda channel converting valve which is provided to the connecting pipe toenable the high pressure pipe and the low pressure pipe to selectivelycommunicate with the connecting pipe.

The controller may control the channel converting valve to allow thehigh pressure pipe to communicate with the connecting pipe in the loadrunning of the first compressing chamber, and controls the channelconverting valve to allow the low pressure pipe to communicate with theconnecting pipe in the no-load running of the first compressing chamber.

The rotary compressor may further include an air conditioner, comprisinga condenser which performs heat-exchange between a compressing mediacompressed from the rotary compressor and an outdoor air, an expandingpart which drops the pressure of a compressing media condensed from thecondenser, an evaporator which performs heat-exchange between acompressing media expanded from the expanding part and an indoor air,and an accumulator which separates a compressing media evaporated fromthe evaporator into gas and liquid, and supplies the compressing mediaof a gaseous state to the rotary compressor.

The foregoing and/or other aspects of the present general inventiveconcept may also be achieved by providing a control method of a rotarycompressor which comprises a cylinder which forms a first compressingchamber and a second compressing chamber partitioned each other, therotary compressor operating in a full load running mode in which a loadrunning is concurrently performed in the first compressing chamber andthe second compressing chamber, and in a partial load running mode inwhich a load running is performed in only the second compressingchamber, the control method comprising performing a load running in thesecond compressing chamber, and intermittently performing a load runningin the first compressing chamber in the partial load running mode.

The load running may be performed in the first compressing chamberaccording to a predetermined period in the partial load running mode.

The control method of the rotary compressor may further comprisemeasuring the temperature of a compressing media discharged from thecylinder in the partial load running mode, wherein the load running isintermittently performed in the first compressing chamber if thetemperature of the compressing media is higher than a predeterminedtemperature.

The control method of the rotary compressor may further comprisemeasuring the temperature of a compressing media discharged from thecylinder in the partial load running mode, wherein the load running isintermittently performed in the first compressing chamber if thetemperature of the compressing media is higher than a predeterminedtemperature.

The foregoing and/or other aspects and utilities of the present generalinventive concept may also be achieved by providing a rotary compressor,comprising a cylinder to form a first compressing chamber and a secondcompressing chamber, and a controller to control the first compressingchamber and the second compressing chamber according to a full loadrunning mode in which a load running is concurrently performed in thefirst compressing chamber and the second compressing chamber, and apartial load running mode in which a load running is performed in onlythe second compressing chamber.

The rotary compressor may further comprise a first roller to rotate inthe first compressing chamber to compress compressing media; a firstvane controllably accommodated in the first vane slot, and a vanedriving part to enable the first vane to contact and be distanced apartfrom an outer surface of the first roller to perform the load runningand a no-load running in the first compressing chamber.

The controller may control the vane driving part based on temperature ofthe compressing media.

The load running may be performed in the first compressing chamber ifthe temperature of the compressing media is higher than a predeterminedtemperature.

BRIEF DESCRIPTION OF THE DRAWINGS

These and/or other aspects and utilities of the prevent generalinventive concept will become apparent and more readily appreciated fromthe following description of the exemplary embodiments, taken inconjunction with the accompanying drawings, in which:

FIG. 1 is a vertical sectional view illustrating a state in which acompressing motion is performed in a first compressing chamber of arotary compressor according to an exemplary embodiment of the presentgeneral inventive concept;

FIG. 2 is a horizontal sectional view taken along line II-II in FIG. 1;

FIG. 3 is a vertical sectional view illustrating a state in which anidling rotation is performed in the first compressing chamber of therotary compressor according to an exemplary embodiment of the presentgeneral inventive concept;

FIG. 4 is a horizontal sectional view taken along line IV-IV in FIG. 3;

FIG. 5 illustrates a control state of the rotary compressor according toan exemplary embodiment of the present general inventive concept;

FIG. 6 illustrates a temperature variation according to time of acylinder in a partial load running of the rotary compressor according toan exemplary embodiment of the present general inventive concept; and

FIG. 7 is a vertical sectional view illustrating a state in which acompressing motion is performed in a first compressing chamber of arotary compressor according to another exemplary embodiment of thepresent general inventive concept.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Reference will now be made in detail to the embodiments of the presentgeneral inventive concept, examples of which are illustrated in theaccompanying drawings, wherein like reference numerals refer to likeelements throughout. The exemplary embodiments are described below so asto explain the present general inventive concept by referring to thefigures.

As illustrated in FIG. 1, a rotary compressor 8 according to anexemplary embodiment of the present general inventive concept comprisesan electromotive part 10 disposed at an inner upper part of an airtightcasing 9, and a compressing part 20 disposed to an inner lower part ofthe casing 9 and connected to a rotating shaft 11 of the electromotivepart 10.

The electromotive part 10 comprises a rotating shaft 11, a cylindricalstator 12 fixed to an inner surface of the casing 9, and a rotor 13rotatably disposed inside the stator 12 and including a central partcoupled to the rotating shaft 11. When power is supplied to the rotarycompressor 8, the rotor 13 rotates so that the electromotive part 10drives the compressing part 20 coupled by means of the rotating shaft11.

The compressing part 20 comprises a cylinder 30 having an upper firstcompressing chamber 31 and a lower second compressing chamber 32partitioned from each other, and a first compressing unit 40 and asecond compressing unit 50 respectively provided in the firstcompressing chamber 31 and the second compressing chamber 32 to bedriven by the rotating shaft 11.

The cylinder 30 comprises an upper first body 33 formed with the firstcompressing chamber 31, a second body 34 formed with the secondcompressing chamber 32 and disposed under the first body 33, anintermediate plate 35 disposed between the first body 33 and the secondbody 34 for partitioning the first compressing chamber 31 and the secondcompressing chamber 32, and a first flange 36 and a second flange 37,respectively mounted to an upper part of the first body 33 and a lowerpart of the second body 34, to close an upper opening of the firstcompressing chamber 31 and a lower opening of the second compressingchamber 32, and to support the rotating shaft 11. The rotating shaft 11penetrates a center portion of the first compressing chamber 31 and thesecond compressing chamber 32, and is connected to the compressing units40 and 50 inside the first compressing chamber 31 and the secondcompressing chamber 32.

The first compressing unit 40 and the second compressing unit 50comprise a first eccentric part 41 and a second eccentric part 51respectively provided to the rotating shaft 11 of the first compressingchamber 31 and the second compressing chamber 32, and a first roller 42and a second roller 52 respectively rotatably coupled to outer surfacesof the first compressing chamber 31 and the second compressing chamber32 to rotate while maintaining contact with inner surfaces of the firstcompressing chamber 31 and the second compressing chamber 32. Eccentricdirections of the first eccentric part 41 and the second eccentric part51 are oppositely disposed so that the first eccentric part 41 and thesecond eccentric part 51 can maintain balance. Here, the first roller 42and the second roller 52 eccentrically rotate in the first compressingchamber 31 and the second compressing chamber 32 to compress acompressing media.

Also, the first compressing unit 40 and the second compressing unit 50comprise a first vane 43 and a second vane 53 to partition thecompressing chambers 31 and 32 and to reciprocate in radial directionsof the first compressing chamber 31 and the second comprising chamber 32according to rotation of the first roller 42 and the second roller 52.As illustrated in FIGS. 1 and 2, the first vane 43 and the second vane53 are accommodated in a first vane slot 44 and a second vane slot 54,which are recessed in a radial direction in inner surfaces of the firstcompressing chamber 31 and the second compressing chamber 32 so thatreciprocation thereof can be guided. The first vane 43 and the secondvane 53 are respectively contacted against outer surfaces of the firstroller 42 and the second roller 52 to partition the first compressingchamber 31 and the second compressing chamber 32 respectively.

The first body 33 and the second body 34 are formed with the first vaneslot 44 and the second vane slot 54 to accommodate the first vane 43 andthe second vane 53, respectively. Accordingly, the first vane 43 and thesecond vane 53 are guided by the first vane slot 44 and the second vaneslot 54.

The first vane slot recesses outward in an inner surface of the firstcompressing chamber 31 to have a thickness similar to a thickness of thefirst vane 43. Also, a magnet 47 is disposed at a rear part of the firstvane slot 44 and contacts a rear end of the first vane 43 to fixedlyhold the first vane 43 to prevent the first vane 43 from being shakenwhen the first vane 43 completely retreats. Accordingly, the rear end ofthe first vane 43 may have a curved sectional shape so that the rear endof the first vane 43 can easily contact the magnet 47 when the firstvane 43 retreats.

The rotary compressor according to an embodiment the present generalinventive concept, comprises a vane driving part 60 to supply a suctionpressure to a rear part of the first vane 43 to hold the first vane 43in a retreated state, or to supply a discharge pressure to a rear partof the first vane 43 to reciprocate the first vane 43. The vane drivingpart 60 holds or releases the first vane 43 so that compressing oridling can be performed in the first compressing chamber 31, that is, aload running or a no-load running can be performed, thereby varying acompressing capacity.

The second vane slot 54 comprises a second vane guide 56 recessedoutward in an inner surface of the second compressing chamber 32 toguide the second vane 53, and a vane spring accommodating part 57 inwhich a vane spring 55 is disposed to press the second vane 53 to thesecond roller 52 so that the second vane 53 can partition the secondcompressing chamber 32.

As illustrated in FIG. 2, the first body 33 and the second body 34 areformed with a suction hole 73 connected with suction pipes 71 and 72 sothat compressing media having a low pressure can be sucked into thefirst compressing chamber 31 and the second compressing chamber 32,respectively and so that discharge holes 75 and 76 can discharge acompressing media having a high pressure and compressed in thecompressing chambers 31 and 32, into the casing 9. Accordingly, when therotary compressor 8 operates, the inside portion of the casing 9 ismaintained to have a high pressure by means of the compressing mediadischarged through the discharge holes 75 and 76, and the compressingmedia inside the casing 9 is guided outward through a discharge pipe 77provided to an upper part of the casing 9.

The compressing media passes through an accumulator 78, and is guided tothe suction hole 73 of the compressing chambers 31 and 32 through thesuction pipes 71 and 72.

As illustrated in FIG. 1, the vane driving part 60 comprises aconnecting pipe 61 communicating with the first vane slot 44, a highpressure pipe 62 which communicates with the connecting pipe 61 so thatpart of the compressing media discharged from the casing 9 can flow, alow pressure pipe 63 communicating with the connecting pipe 61 and asuction tube 70 so that part of the compressing media sucked into thefirst compressing chamber 31 and the second compressing chamber 32 canflow, and a channel converting valve 64 provided at the connecting pipe61 to selectively connect the high pressure pipe 62 and the low pressurepipe 63 to the connecting pipe 61.

The channel converting valve 64 comprises an electromotive three-wayvalve disposed in a connecting area of the connecting pipe 61, the highpressure pipe 62 and the low pressure pipe 63. An outlet of theconnecting pipe 61 is connected to the first flange 36, and the firstflange 36 is formed with a communicating channel 36 a enabling theconnecting pipe 61 to communicate with the first vane slot 44.

The rotary compressor 8 according to an embodiment the present generalinventive comprises a controller 80 to control the vane driving part 60so that a load running can be periodically performed in the firstcompressing chamber 31 in a partial load running mode. As illustrated inFIG. 5, the controller 80 controls the vane driving part 60 so that thefirst vane 43 contacts and is distanced apart from an outer surface ofthe first roller 42 according to a predetermined period. In the partialload running, the controller 80 opens the channel converting valve 64during a predetermined time Ta according to a predetermined period Tb,so that the high pressure pipe 62 can communicate with the connectingpipe 61, supplies a discharge pressure of the compressing media to arear part of the first vane 43, and accordingly, performs a full loadrunning in which 100% compressing can be accomplished in the firstcompressing chamber 31 and the second compressing chamber 32. That is,in the partial load running, the controller 80 of the rotary compressor8 according to an embodiment of the present general inventive conceptalternately supplies a discharge pressure and a suction pressure of thecompressing media to a rear part of the first vane 43 so that the firstvane 43 can be contacted with and distanced from an outer surface of thefirst roller 42, thereby periodically performing a load running and ano-load running in the first compressing chamber 31.

Also, the rotary compressor 8, according to an embodiment of the presentgeneral inventive concept, may be provided to constitute a circuit of anair conditioner. That is, the air conditioner comprises the rotarycompressor 8 according to an embodiment of the present general inventiveconcept, a condenser 3 to perform heat-exchanging between compressingmedia discharged from the compressor 8 and outdoor air, an expandingpart 5 to drop the pressure of the condensed compressing media, anevaporator 7 to perform heat-exchanging between the expanded compressingmedia and an indoor air, and the accumulator 78 to separate theevaporated compressing media into gas and liquid to supply thecompressing media of a gaseous state to the compressor 8.

Hereinafter, an operating process of the rotary compressor 8 accordingto an embodiment of the present general inventive concept will bedescribed.

As illustrated in FIGS. 1 and 2, when the channel converting valve 64 isopened so that the high pressure pipe 62 can communicate with theconnecting pipe 61, a discharge pressure is applied to a rear part ofthe first vane 43. Accordingly, since the first vane 43 is pushed towardthe first compressing chamber 31 by means of the discharge pressure, thefirst vane 43 contacts an outer surface of the first roller 42 toreciprocate according to an eccentric rotation of the first roller 42.In contrast, as illustrated in FIGS. 3 and 4, when the channelconverting valve 64 is opened so that the low pressure pipe 63 cancommunicate with the connecting pipe 61, a suction pressure is appliedto a rear part of the first vane 43. Accordingly, since the first vane43 is suspended in a retreated state, an idling rotation is performed inthe first compressing chamber 31. When the first vane 43 retreats to besuspended (restricted), since a rear end of the first vane 43 isattached to the magnet 47, the first vane 43 is prevented from beingshaken. That is, although a pressure variation is generated in the firstcompressing chamber 31 by operation of the first roller 42 idling in thefirst compressing chamber 31, the first vane 43 can be prevented fromtrembling to perform a silent operation.

With this configuration, the rotary compressor 8 according to thepresent general inventive concept controls restriction of the first vane43 by means of the vane driving part 60 so that compressing or an idlingrotation can be performed in the first compressing chamber 31, therebyvarying a compression capacity. That is, if the discharge pressure isapplied to the rear part of the first vane 43 so that the first vane 43is contacted against an outer surface of the first roller 42 toreciprocate, compressing is performed in both the first compressingchamber 31 and the second compressing chamber 32, thereby performing alarge capacity compression. Accordingly, the compressor 8 according tothe present general inventive concept operates in a full load runningmode. In contrast, if the suction pressure is applied to the rear partof the first vane 43 to restrict the first vane 43, that is, to distancethe first vane 43 from the first roller 42, an idling rotation isperformed in the first compressing chamber 31, and compressing isperformed in only the second compressing chamber 32, thereby reducingthe compression capacity. Accordingly, the compressor 8 according to anembodiment of the present general inventive concept operates in apartial load running mode.

During the partial load running of the compressor 8, the controller 80alternately supplies the discharge pressure and the suction pressure tothe rear part of the first vane 43 in a predetermined period so that thefirst vane 43 can be contacted with and distanced from the outer surfaceof the first roller 42, thereby periodically performing a load runningand a no-load running in the first compressing chamber 31.

Accordingly, in the partial load running of the compressor 8, acompressing media leaked from between the rotating shaft 11 and thefirst roller 42 to the first compressing chamber 31 can be preventedfrom counterflowing through the suction hole 73, and can be compressedby operation of the first roller 42 and the first vane 43 to beperiodically discharged through the discharge hole 75. Accordingly, therotary compressor 8 according to the an embodiment of the presentgeneral inventive concept, as illustrated in FIG. 6, can prevent thetemperature of the cylinder 30 from increasing as a partial load runningtime elapses in the partial load running of the compressor 8, and thusdecrease the temperature of the cylinder 30 according to a predeterminedperiod, restrict a temperature increase of the accumulator 78, improveefficiency of the compressor 8, and improve a partial load efficiency.

A rotary compressor according to another exemplary embodiment of thepresent general inventive concept is illustrated in FIG. 7. A rotarycompressor 8′ according to another exemplary embodiment of the presentgeneral inventive concept further comprises a temperature sensing part83 to measure the temperature of a compressing media discharged from acasing 9, and a controller 80 to control a vane driving part 60 based ona signal of the temperature sensing part 83.

During partial load running, the controller 80 of the rotary compressor8′ according to another exemplary embodiment of the present generalinventive concept controls a vane driving part 60 to alternately supplya discharge pressure and a suction pressure of a compressing media to arear part of a first vane 43 according to the temperature of thecompressing media discharged from the casing 9, so that the first vane43 can be contacted with and distanced from an outer surface of a firstroller 42, thereby performing a load running and a no-load running in afirst compressing chamber 31.

That is, if the temperature of the compressing media discharged from thecasing 9 through a discharge tube 77 is higher than a predeterminedtemperature, the controller 80 opens a channel converting valve 64during a predetermined time so that a high pressure pipe 62 cancommunicate with a connecting pipe 61, can supply a discharge pressureof the compressing media to a rear part of the first vane 43, andaccordingly, can perform a full load running in which 100% compressingcan be accomplished in the first compressing chamber 31 and the secondcompressing chamber 32.

Accordingly, the temperature of the compressor 8′ can be prevented fromincreasing during a partial load running, and the temperature of anaccumulator 78 can be decreased, resulting in improved efficiency ofboth the compressor 8′ and the partial load operation.

As described above, in a partial load running of a compressor, byintermittently performing a load running, a temperature increase of acylinder according to the partial load running can be prevented, and apartial load efficiency of the compressor can be improved.

In an exemplary embodiment, when a compressor operates during a partialload running, a load running and a no-load running are performed in afirst compressing chamber according to a predetermined period.Alternatively, a load running and a no-load running may be performed ina first compressing chamber aperiodically.

In the above exemplary embodiment, when the compressor operates duringthe partial load running, the load running and the no-load running areperformed in the first compressing chamber according to a predeterminedperiod, or according to a temperature of a compressing media dischargedfrom the compressor. Alternatively, in the partial load running, a loadrunning and a no-load running may be performed in the first compressingchamber according to a predetermined period and the temperature of thecompressing media discharged from the compressor.

As described above, the present general inventive concept provides arotary compressor, a control method and an air conditioner using thesame to improve a partial load running, thereby preventing thetemperature of a cylinder from increasing according to the partial loadrunning, and improving a partial load efficiency of the compressor.

Although a few exemplary embodiments of the present general inventiveconcept have been shown and described, it will be appreciated by thoseskilled in the art that changes may be made in these exemplaryembodiments without departing from the principles and spirit of thegeneral inventive concept, the scope of which is defined in the appendedclaims and their equivalents.

1. A rotary compressor comprising: a cylinder to form a firstcompressing chamber and a second compressing chamber partitioned fromeach other and comprising: a first vane slot formed in the firstcompressing chamber, and a second vane slot formed in the secondcompressing chamber; a first roller to rotate in the first compressingchamber to compress compressing media; and a second roller to rotate inthe second compressing chamber to compress the compressing media; afirst vane controllably accommodated in the first vane slot; a vanedriving part to enable the first vane to contact and be distanced apartfrom an outer surface of the first roller to perform a load running anda no-load running in the first compressing chamber; and a controller tocontrol the vane driving part to intermittently perform the load runningin the first compressing chamber in the partial load running mode,wherein the rotary compressor operates in a full load running mode inwhich a load running is concurrently performed in the first compressingchamber and the second compressing chamber, and in a partial loadrunning mode in which a load running is performed in only the secondcompressing chamber.
 2. The rotary compressor according to claim 1,wherein the controller controls the vane driving part so that the firstvane can contact and be distanced apart from the outer surface of thefirst roller according to a predetermined period.
 3. The rotarycompressor according to claim 2, further comprising: a temperaturesensing part to measure temperature of the compressing media dischargedfrom the cylinder, wherein the controller controls the vane driving partbased on a signal of the temperature sensing part.
 4. The rotarycompressor according to claim 1, further comprising: a temperaturesensing part to measure temperature of the compressing media dischargedfrom the cylinder, wherein the controller controls the vane driving partbased on a signal of the temperature sensing part.
 5. The rotarycompressor according to claim 1, wherein the vane driving partcomprises: a connecting pipe to communicate with the first vane slot; ahigh pressure pipe to communicate with the connecting pipe, and to allowpart of the compressing media discharged from the cylinder to flowtherethrough; a low pressure pipe to communicate with the connectingpipe, and to allow part of the compressing media introduced into thecompressing chambers to flow therethrough; and a channel convertingvalve provided at the connecting pipe to enable the high pressure pipeand the low pressure pipe to selectively communicate with the connectingpipe.
 6. The rotary compressor according to claim 5, wherein thecontroller controls the channel converting valve to allow the highpressure pipe to communicate with the connecting pipe in the loadrunning of the first compressing chamber, and controls the channelconverting valve to allow the low pressure pipe to communicate with theconnecting pipe in the no-load running of the first compressing chamber.7. An air conditioner, comprising: a rotary compressor, comprising: acylinder to form a first compressing chamber and a second compressingchamber partitioned from each other and comprising: a first vane slotformed in the first compressing chamber, and a second vane slot formedin the second compressing chamber; a first roller to rotate in the firstcompressing chamber to compress compressing media; and a second rollerto rotate in the second compressing chamber to compress the compressingmedia, a first vane controllably accommodated in the first vane slot, avane driving part to enable the first vane to contact and be distancedapart from an outer surface of the first roller to perform a loadrunning and a no-load running in the first compressing chamber, and acontroller to control the vane driving part to intermittently performthe load running in the first compressing chamber in the partial loadrunning mode, wherein the rotary compressor operates in a full loadrunning mode in which a load running is concurrently performed in thefirst compressing chamber and the second compressing chamber, and in apartial load running mode in which a load running is performed in onlythe second compressing chamber; a condenser to perform heat-exchangebetween the compressing media compressed from the rotary compressor andoutdoor air; an expanding part to drop pressure of the compressing mediacondensed from the condenser; an evaporator to perform heat-exchangebetween the compressing media expanded from the expanding part and anindoor air; and an accumulator to separate the compressing mediaevaporated from the evaporator into gas and liquid, and to supply thecompressing media of a gaseous state to the rotary compressor.
 8. Theair conditioner of claim 7, wherein the controller controls the vanedriving part so that the first vane can contact and be distanced apartfrom the outer surface of the first roller according to a predeterminedperiod.
 9. The air conditioner of claim 8, further comprising: atemperature sensing part to measure temperature of the compressing mediadischarged from the cylinder, wherein the controller controls the vanedriving part based on a signal of the temperature sensing part.
 10. Theair conditioner of claim 7, further comprising: a temperature sensingpart to measure temperature of the compressing media discharged from thecylinder, wherein the controller controls the vane driving part based ona signal of the temperature sensing part.
 11. The air conditioner ofclaim 7, wherein the vane driving part comprises: a connecting pipe tocommunicate with the first vane slot; a high pressure pipe tocommunicate with the connecting pipe, and to allow part of thecompressing media discharged from the cylinder to flow therethrough; alow pressure pipe to communicate with the connecting pipe, and to allowpart of the compressing media introduced into the compressing chambersto flow therethrough; and a channel converting valve provided at theconnecting pipe to enable the high pressure pipe and the low pressurepipe to selectively communicate with the connecting pipe.
 12. The airconditioner of claim 11, wherein the controller controls the channelconverting valve to allow the high pressure pipe to communicate with theconnecting pipe in the load running of the first compressing chamber,and controls the channel converting valve to allow the low pressure pipeto communicate with the connecting pipe in the no-load running of thefirst compressing chamber.
 13. A control method of a rotary compressorwhich comprises a cylinder which forms a first compressing chamber and asecond compressing chamber partitioned from each other, the rotarycompressor operating in a full load running mode in which a load runningis concurrently performed in the first compressing chamber and thesecond compressing chamber, and in a partial load running mode in whicha load running is performed in only the second compressing chamber, thecontrol method comprising: performing a load running in the secondcompressing chamber; and intermittently performing a load running in thefirst compressing chamber in the partial load running mode.
 14. Thecontrol method of the rotary compressor according to claim 13, whereinthe load running is performed in the first compressing chamber accordingto a predetermined period in the partial load running mode.
 15. Thecontrol method of the rotary compressor according to claim 13, furthercomprising: measuring the temperature of the compressing mediadischarged from the cylinder in the partial load running mode, whereinthe load running is intermittently performed in the first compressingchamber if the temperature of the compressing media is higher than apredetermined temperature.
 16. The control method of the rotarycompressor according to claim 14, further comprising: measuring thetemperature of the compressing media discharged from the cylinder in thepartial load running mode, wherein the load running is intermittentlyperformed in the first compressing chamber if the temperature of thecompressing media is higher than a predetermined temperature.
 17. Arotary compressor, comprising: a cylinder to form a first compressingchamber and a second compressing chamber; and a controller to controlthe first compressing chamber and the second compressing chamberaccording to a full load running mode in which a load running isconcurrently performed in the first compressing chamber and the secondcompressing chamber, and a partial load running mode in which a loadrunning is performed in only the second compressing chamber.
 18. Therotary compressor of claim 17, further comprising: a first roller torotate in the first compressing chamber to compress compressing media; afirst vane controllably accommodated in the first vane slot; and a vanedriving part to enable the first vane to contact and be distanced apartfrom an outer surface of the first roller to perform the load runningand a no-load running in the first compressing chamber.
 19. The rotarycompressor of claim 18, wherein the controller controls the vane drivingpart based on temperature of the compressing media.
 20. The rotarycompressor of claim 19, wherein the load running is performed in thefirst compressing chamber if the temperature of the compressing media ishigher than a predetermined temperature